Properties & States of Matter
What is the smallest chemical unit of an element?
What is an atom
Fill in the blank: Matter cannot be created or ________, but it can change forms
Destroyed
Which is the product of this equation:
C + O2 -------> CO2
CO2
What type of chemical reaction requires oxygen as one of its reactants? (hint: this reaction happens rapidly often producing heat and light)
A combustion reaction
A vector is a quantity/measurement that includes both ____________ and _________.
Magnitude and direction
In a sugar water solution, which is the solute: sugar, or water?
What is sugar
What is the smallest subatomic particle called?
electron
What do you call an atom or group of atoms with a positive or negative charge?
An ion
What do you call the energy that is stored in chemical bonds?
Chemical energy
What is the net force of a balanced force? (there is no acceleration)
Zero
Is a bowl of cereal considered a hetergenous or homogenous mixture?
What is heterogenous
What two subatomic particles make up the nucleus of an atom?
Protons and neutrons
What do you call a chemical bond formed between oppositely charged ions?
An ionic bond
Which type of reaction absorbs energy from its surroundings, endothermic or exothermic?
Endothermic
What is the name of the force that opposes the initiation of movement?
static friction
In which state of matter does a substance have neither a definite shape nor a definite volume?
What is a gas
Which group in the periodic tables contains the most stable elements? ( Group 1 - Group 8)
Group 8, the Noble Gases
What do you call a chemical bond in which two atoms share one or more pairs of valence electrons?
A covalent bond
Energy is measured in units called ___________.
joules (J) and kilojoules (kJ)
Newtons second law states that when an object is acted on by an unbalanced force, the net force is equal to the ________ of the object times the resulting ______. F=___x____
Mass times acceleration
Color change, formation of a gas, formation of a solid
Why do elements in the same group have similar properties? (hint, think about the electrons)
What do you call the type of bond that holds polar water molecules together and gives water its very important traits that allows life to exist on Earth?
Hydrogen bonds
What is Avogadro's number?
6.02 x 10^23
What is the SI unit for force?
Newtonsk (N)